Carburetor



Sept. 16,. 1930.

J. A. PERRY CARBURETOR Filed June 6. 1928 'Patented Sept. 16, 1930 JOHNARTHUR PERRY, OF MAIDSTONE, VICTOBIA,"AUSTBALIA CARIBURETOR Applicationfiled June 6, 1928, Serial No.

This invention relates to carburetors fixed and its objects are toprovide an improved carburetor in which the liquid fuel is thoroughlyvaporized and filtered. before the gas formed by the admixture of liquidfuel and air is admitted to the cylinder or cylinders of the engine, andto maintain ity of mixture or gas.

The invention is illustrated-by the accompanying drawings, whereof,Figure l is a longitudinal vertical sectio of a practical form of theinvention.

Figures 2, 3 and 4 are plan view-s of baffle. plates, shown in Figure 1.

Figure 5 is a plan of a choke. According to these drawings the floatchamber 1. is located adjacent a cylindrical preferably formed integralwith a standard qual the same. I The liquid fuel passes from the floatchamber down an outlet passage 8 formed in the bottom 4 of said chamberand opening into a well or trap-5 below its lower end, which well is incommunication with an inlet passage 6 formed in the bottom 7 of thecasing 2, said inlet passage being upwardly inclined and communicatingwith the fuel jet or nozzle 8 in the casing.

By means of this construction any water in the fuel will drain from bothpassages 3 and 6 into said well 5. The latter is closed at the bottombya hollow screw plug 9 in alignment with passage 3 and can be removed toempty the well and permit the passage 3 being celared of any foreignmatter or obstruction.

For the purpose of facilitating the cleaning of passage 6 the wall ofthe well is formed with a hole normally closed by a screw plug 10 inalignment with passage Adjacent the discharge end of the fuel jet 8 isan automatically adjustable choke l1 normally retained on a seating 12formed in the wall ofthe casing 2 by a spring 13. Said choke is formedwith a central annular upturned mouth 14 which is flared towards itslower or inletend, and around said mouth is an annular Well 15.

The upper discharge end of the fuel jet 283,279, and in Austral ia June14, 1927.

is located. within the mouth of the choke, and to and used in internalcombustion engines,"

charge end of the jet and the choke.

It may be stated at this point, that the lifting of the choke 11 doesnot increase the air supply area, but actually reduces the suctionof thepetrol supply; that is to say, the mixture is proportioned by theintensity of the suction. If the choke is lo'wer, tluamount of fueldrawn up willbe greater than when it is lifted, according asthe area ofthe orifice in the choke is, or isnot in close proximity to thejet,which is another way of saying that more air is admitted.

The purpose of the well 15 of the choke s to collect non-vaporizedliquid fuel, which eventually isvaporized and becomes admixed Wltll theam,

The casing is provided above or in advance .of the fuel jet and thechoke, with a central primary baflle 18 formed with radial lugs 33 (Fig.4) supported on a seating 23 in the wall of the casing. Said balfle islocated above orin advance of the annular lip 43 of the mouth of thechoke and there is an the well 15;

Surrounding the inner baffle-18 is another or outer baffle 22 formedwith radial lugs 34 (F ig. 8) which rest on lugs 33 and are secured byscrews 34*, said baffle 22 being of conical section, i. e., it tapersinteriorly towards its mouth 24 and'is formed with a series of annularserrations or steps 25, the edges of which arepreferably parallel withthose of the bafiie 18. Around the mouth 24 is an annular well 44 thatcollects any nonvaporized fuel.

The combustionmixture or gas passing through the passage 1-9fbetweenthe. inner face of the first or course is deflected tangentially towardthe lower edge of saidbaflle. It is then drawn up and outer baffles isagain subjected to a swirling action which tends to improve said mixturefurther, as well as to remove non-va porized liquid; and finally themixture meets still a third baffle 26 arranged transversely of thecasing at a distance from the mouth of baffle 22. This b aille 26 restsor abuts against theedge of the cylindrical casing* 40 of baffle 22 andis formed with a ring of outlets 27, while its central non-perforatedportion 28 is located'above or centrally, in advance of the mouth 24: ofbaffle 22, and is preferably made concave as at 29"o'n'tlie underside,said baflie being the final one einployed to ensure and inaintainastandard quality ofniixture or It will be understood that if there isany non-vaporized fuel still in the mixture it will strike the concavesurface 29 of the central portion 28 and that any striking theserrations 25 of baflie 22 will drip into well which is in alignmentwith the entrance of passage 19. i

In advance'of the baffle 26 within the casing is the usual butterfly orother valve 30 controlling the supply of the combustible mixture to thecylinder or cylinders of the engine.

he choke l1 may be guided in its movements by means of arms 31 connectedto a collar 32 slid-able on the jet 8.

i According to the construction described the mixture of liquid fuel andairis drawn by suction through the automatic choke 11 and impingesagainst the serrated interior surlower baffle 18 wherein its through thesecond or intermediate baffle 22, the effect of the serrations on thesurface of that battle being to impart a centrifugal motion to the gasor mixture which thereby precipitates any unvaporized fuel or otherliquid into the well 15 and prevents it from passing to the inductionpipe and cylinders. The baffle 26 completes theadmixture of the fuel andair which passes through valve -to the intake manifold of the engine. 7

It must be understood that the invention is also applicable to acarburetor disposed in a horizontal or inclined position.

I claim: v

1. In a carburetor, a casing havingan air inlet, a fuel jet therein, ahollow conical baffle located centrally of said casing and fuel jet andin advance of the latter, the interior wall engines, a casing'et'therein, a movable ad ustable choke con trolled by the enginesuction and 'iiular well, an inner conical located centrally of saidcasing and fuel jet and in advance ofthe latter, the interior wall ofsaid baflle being formed with serrations, and another baiile of conicalsection located outside the first one and formed with a centralmouthsurrounding the same, with a passage between said baffles, theinterior surface of theouter b'afll being formed with serrae tions, saidouter bafllc being provided around its'mouth with a well.

3. Ina carburetor for internal combustion having an an inlet, a fuelprovided .w1th an annular we'll,"and inner and outer battles, one withinthe other,w1th an annular conical passage between the same in alignmentwith the well of said choke.

at. In a carburetor for internal combustion engines, a casing having anair inlet, a fuel jet therein, a movablechoke controlled by the enginesuction and'provided with ananhollow baffle above said, choke, and anouterconical section baiile provided with a centralmouth and "with awell around said mouth, the outer baffle surrounding the inner battleand spaced therefrom by an intermediate conical passage, each bafflebelng formed on its interior surfaces with a series of steps.

5. In a carburetor for internal combustion engines, a casing having anair inlet, a fuel jet therein, a movable adjustable choke controlled bythe engine suction and provided with an annular well, an inner conicalhollow bafiie above said choke, an outer conical section baffle providedwith a central mouth and with a well around said mouth, the outer bafiiesurrounding the inner baffle and spaced therefrom by an intermediateconical passage between the baffles, each 'bafile being formed on itsinterior surfaces with aseries of steps, and a third baffle locatedtransversely in the'casing and formed with a ring of outlets surroundinga central non-perforated portion formed on the underside with a concavesurface."

In witness whereof I have signed this specification. Y

JOHNA. PERRY of said baffle being formed with s'errations,

and another baffle of conical section located outside the first one andformed with a central mouth surrounding the same, with a passage betweensaid battles, the interior surface of the outer baflie'being formed withserrations.

*2. In a carburetor, afcasing havlng an air inlet, a fuel jet therein, ahollow. conical baflie

